园林景观空间元素合理布局模拟方法仿真研究

Simulation Research on Simulation Method of Reasonable Layout of Spatial Elements in Garden Landscape

采用当前方法规划园林景观中存在的空间元素时,计算得到的景观指标权重与实际不符,求解模型所用的时间较长,导致构建的空间元素布局优化模型的精准度较低、收敛速度慢。提出园林景观空间元素合理布局模拟方法。选取斑块面积、景观百分比、斑块数、最大斑块指数、斑块平均面积作为景观指数,利用层次分析法计算上述景观指标的权重,并通过一致性检验修改并调整判断结果;根据计算结果构建园林景观空间元素布局优化模型,采用混合遗传算法通过编码、选择初始群体、计算适应值、复制、交换和变异等操作得到园林景观空间元素布局优化模型的最优解,完成园林景观空间元素的合理布局模拟。仿真实验结果表明,所提方法构建的优化模型精准度高、收敛速度快。

When the current method was used to plan the spatial elements in landscape,the weight of landscape indicator was inconsistent with the actual weight,leading to low accuracy and slow convergence of optimization mod el.Therefore,a reasonable layout method for spatial elements in garden landscape was proposed.Firstly,we chose plaque area,landscape percentage,plaque number,maximum plaque index and average plaque area as landscape in dexes.Then,we used the analytic hierarchy process to calculate the weights of above landscape indexes.Meanwhile,we modified and adjusted the judgment result through the consistency check.According to the calculation result,we built the layout optimization model of spatial element in garden landscape.Based on the mixed genetic algorithm,we obtained the optimal solution of spatial element layout model of garden landscape by coding,selecting the initial group,calculating the fitness value,copying,exchanging and mutating.Finally,we completed the reasonable layout simulation for spatial elements in garden landscape.Simulation results show that the optimized model constructed by the proposed method has high accuracy and fast convergence.